oh.. the difference between the the ONE field and the remaining 29 is
massive.
It's like 200ms for just the 29 columns.. adding the extra one cause it to
timeout .. 5000ms...
On Mon, Jun 23, 2014 at 10:30 PM, DuyHai Doan doanduy...@gmail.com wrote:
Don't forget that when you do the Select
Yes but adding the extra one ends up by * 1000. The limit in CQL3 specifies
the number of logical rows, not the number of physical columns in the
storage engine
Le 24 juin 2014 08:30, Kevin Burton bur...@spinn3r.com a écrit :
oh.. the difference between the the ONE field and the remaining 29 is
Assuming we're talking about the DataStax Java driver:
getBytes will throw an exception, because it validates that the column is
of type BLOB. But you can use getBytesUnsafe:
ByteBuffer b = row.getBytesUnsafe(aTextColumn);
// if you want to check it:
Charset.forName(UTF-8).decode(b);
You can use getBytesUnsafe on the UTF8 column
--
Sent from my iPhone
Am 24.06.2014 um 09:13 schrieb Olivier Michallat
olivier.michal...@datastax.com:
Assuming we're talking about the DataStax Java driver:
getBytes will throw an exception, because it validates that the column is of
Hello!
I'm a beginner in C* and I'm quite struggling with it.
I’d like to measure the performance of some Cassandra-Range-Queries. The
idea is to execute multidimensional range-queries on Cassandra. E.g. there
is a given table of 1million rows with 10 columns and I like to execute
some queries
Hello,
I need to store a list of mixed types in Cassandra. The list may contain
numbers, strings and booleans. So I would need something like list?.
Is this possible in Cassandra and if not, what workaround would you suggest
for storing a list of mixed type items? I sketched a few (using a list
And with python use future.has_more_pages and
future.start_fetching_next_page().
On Tue, Jun 24, 2014 at 1:20 AM, DuyHai Doan doanduy...@gmail.com wrote:
With the Java Driver, set the fetchSize and use ResultSet.iterator
Le 24 juin 2014 01:04, ziju feng pkdog...@gmail.com a écrit :
Hi All,
Can you do you query in the cli after setting tracing on?
On Mon, Jun 23, 2014 at 11:32 PM, DuyHai Doan doanduy...@gmail.com wrote:
Yes but adding the extra one ends up by * 1000. The limit in CQL3
specifies the number of logical rows, not the number of physical columns in
the storage engine
Use a ByteBuffer value type with your own serialization (we use protobuf
for complex value structures)
On Jun 24, 2014 5:30 AM, Tuukka Mustonen tuukka.musto...@gmail.com
wrote:
Hello,
I need to store a list of mixed types in Cassandra. The list may contain
numbers, strings and booleans. So I
You'd be better off using external indexing (ElasticSearch or Solr),
Cassandra isn't really designed for this sort of querying.
On Jun 24, 2014 3:09 AM, Mike Carter jaloos...@gmail.com wrote:
Hello!
I'm a beginner in C* and I'm quite struggling with it.
I’d like to measure the performance
1) You can use list of strings which are serialized JSONs, or use
ByteBuffer with your own serialization as Jeremy suggested.
2) Use Cassandra 2.1 (not officially released yet) were there is new
feature of user defined types.
Pavel
On Tue, Jun 24, 2014 at 9:18 AM, Jeremy Jongsma
Yes… I confirmed that getBytesUnsafe works…
I also have a unit test for it so if cassandra ever changes anything we'll
pick it up.
One point in your above code. I still think charsets are behind a
synchronized code block.
So your above code wouldn't be super fast on multi-core machines. I
What if I need to query by list items?
1. Jeremy, with blob field (ByteBuffer), I can query exact matches (just
encode the value in query), but greater/less than queries would not work.
Any sort of serialization kills native ways to query data
2. Even with user defined types, I would need to
Jeremy, with blob field (ByteBuffer), I can query exact matches (just
encode the value in query), but greater/less than queries would not work.
Any sort of serialization kills native ways to query data -- Not
necessarily. You still use normal types (uuid, string, timestamp,...) for
clustering
Does that mean the iterator will give me all the data instead of 1 rows?
On Mon, Jun 23, 2014 at 10:20 PM, DuyHai Doan doanduy...@gmail.com wrote:
With the Java Driver, set the fetchSize and use ResultSet.iterator
Le 24 juin 2014 01:04, ziju feng pkdog...@gmail.com a écrit :
Hi All,
Yes. And I advise to set fetchSize to a smaller value than 10 000. 1000 is
a good start. As long as there are still results, the iterator will fetch
data for you by batch of fechtSize
On Tue, Jun 24, 2014 at 9:03 PM, ziju feng pkdog...@gmail.com wrote:
Does that mean the iterator will give me
Hi,
I am using Cassandra on EC2 instances. My cassandra always returns private
ips of the instances to the thrift program. Then the program cannot connect
to the private ips.
I already changed the
rpc_address: elastic ip
rpc_address: elastic ip
Then I restarted the cassandra cluster. But the
Cassandra knows nothing about elastic ip. You have to use ssh tunnel or run
your client on ec2 instance.
Thank you,
Andrey
On Tue, Jun 24, 2014 at 8:55 PM, Huiliang Zhang zhl...@gmail.com wrote:
Hi,
I am using Cassandra on EC2 instances. My cassandra always returns private
ips of the
Thanks. Is there a way to configure Cassandra to use elastic ip instead of
private ip?
On Tue, Jun 24, 2014 at 9:29 PM, Andrey Ilinykh ailin...@gmail.com wrote:
Cassandra knows nothing about elastic ip. You have to use ssh tunnel or
run your client on ec2 instance.
Thank you,
Andrey
Yes, I realized the way to use CQL.
I checked the way how map data is represented by using cassandra-cli. For
each element in the map, it use the key as part of the column name and
value as the column value. I just cannot insert this by using thrift API
because I already defined a CompositeType
you can set rpc_address to 0.0.0.0, then it will listen on all interfaces.
Also you have to modify security group settings to allow incoming
connection for port 9160. But it is a really bad idea. By this way you open
your cluster to whole world, ssh tunnel is the best way.
On Tue, Jun 24, 2014
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